/**
 * Tencent is pleased to support the open source community by making Polaris available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * Unless required by applicable law or agreed to in writing, software distributed
 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */

package utils

import "sync/atomic"

func NewAtomicValue[V any](v V) *AtomicValue[V] {
	a := new(AtomicValue[V])
	a.a = atomic.Value{}
	a.Store(v)
	return a
}

type AtomicValue[V any] struct {
	a atomic.Value
}

func (a *AtomicValue[V]) HasValue() bool {
	if a == nil {
		return false
	}
	v := a.a.Load()
	return v != nil
}

func (a *AtomicValue[V]) Store(val V) {
	a.a.Store(val)
}

func (a *AtomicValue[V]) Load() V {
	return a.a.Load().(V)
}
